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4/2/2019 Effect of C/N Ratio on the Removal of Nitrogen and Microbial Characteristics in the Water Saturated Denitrifying Section of a Two-Stage C... <br /> 80 <br /> �-TN in etllueni of-FI (control) <br /> 75 rN in effluent of T? (C':N=2:1) <br /> 70 -A -IN in effluent of T3 (C:N=5:1) <br /> —VL-TN in influent <br /> 65 <br /> T <br /> 60 T <br /> 55 <br /> 50 <br /> 0 <br /> :. 45 <br /> L <br /> r 40 <br /> a� <br /> 35 _ <br /> 0 <br /> 30 <br /> 25 <br /> 20 - <br /> 15 - <br /> 10 <br /> 0 5 10 15 20 25 30 35 40 45 50 <br /> Time (d) <br /> a <br /> 90 <br /> 80 <br /> 70 <br /> IR <br /> 0 <br /> >b60 - ♦-'I'N removal efficiency of"I'l (control) <br /> —+—TN removal e1*1icicncy of T2 (C:N-2:1 ) <br /> 50 -TN removal efficiency of 13 ((':N=5:1) <br /> 40 <br /> ca <br /> 30 <br /> a� <br /> L <br /> z 20 <br /> F- <br /> 10 - <br /> Open in a separate window <br /> Figure 5 <br /> Total nitrogen removal of the second sta�ee of the CRI of the three experimental tests with variable CM <br /> ratios. (a)Total nitrogen concentration in influent of the first stage and in effluent of the second stage;(b) <br /> Total nitrogen removal efficiency. <br /> https:/Avww.ncbi.nlm.nih.gov/pmc/articles/PMC6069465/ 10/18 <br />